Nice compositions. I like that you came on a day with a dramatic sky. You did a good job keeping the perspective under control, keeping the vertical lines vertical rather than converging to the center. Also a good job avoiding overlaps among the windmills. Neither of those happen without effort - and you clearly made the effort. However, I could nit pick both points just a bit in the photos, which you no doubt already saw yourself.
I tend to prefer B&W for a subject like this, but the color photo is very pleasing also. Environmentally oriented subjects are always in demand by publishers. And if you are considering that direction you should always be able to offer both color and B&W as you have done. Generally color is in more demand with all subjects.